That's great Willber I was just showing what the Alfa Workshop suggest and [I believe] Alfa. I have read the threads on here regarding tensioners and water pumps. Autolusso suggests 4 years.
The thing is someone at some point has said it is better to be safe and do it at 4 years because...
Ultimately it is the owners decision when and how often it is changed. Who's to say it won't fail at three or two years?
I see so many of these debates on cambelt change. It's the same on Ferrari forums. Incredibly it has been suggested pre 1990 cars every two years or 36k whichever comes first.
One of my good friends services his F355 himself, he works for the CAA auditing aircraft and pilots, a pretty good engineer. He is happy to go four or even five years (Ferrari recommend three years) with his experience of replacing them himself. An opinion and one I respect, however it is just one of many (albeit on a Ferrari
So there are recommendations from various sources and the owner has to make the decision
which to follow. It seems (though I can't confirm it) Alfa suggest five years.
How much easier it is on none Italian cars, that seems to be the common denominator here.